﻿// Spun AJAX Framework
// Copyright (C) 2008 Blake Hegerle
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Spun.Communications.Hosting;
using System.Net;
using System.IO;
using System.Xml.Xsl;
using System.Xml.XPath;
using System.Reflection;
using System.Xml;

namespace Spun.Communications.Views
{
    public class ViewServer : IServer
    {
        public ViewServer(string DefaultViewName)
        {
            this.BaseViewUrl = DefaultViewName;
        }

        #region IServer Members

        public void ProcessRequest(HttpListenerContext Context, string RelativePath)
        {
            if (string.IsNullOrEmpty(RelativePath))
                RelativePath = BaseViewUrl;

            Context.Response.StatusCode = 200;
            Context.Response.ContentType = GetContentType(Context);

            var Document = GetDocument(RelativePath);

            var Args = new XsltArgumentList();
            Transform.Transform(Document, Args, Context.Response.OutputStream);

            Context.Response.Close();
        }

        #endregion

        private string GetContentType(HttpListenerContext Context)
        {
            var Xhtml = "application/xhtml+xml";

            if (Context.Request.AcceptTypes.Contains(Xhtml))
                return Xhtml;
            else
                return "text/html";
        }

        private XPathDocument GetDocument(string RelativePath)
        {
            using (var FileStream = File.Open(RelativePath, FileMode.Open))
                return new XPathDocument(FileStream);
        }

        private string BaseViewUrl;

        private static XslCompiledTransform Transform;
        static ViewServer()
        {
            Transform = new XslCompiledTransform();

            var Resource = "Spun.Communications.Views.Views.xslt";
            var Stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(Resource);

            Transform.Load(new XPathDocument(Stream));
        }
    }
}
